Brake shoe and lining assembly



July 20, 1954 H. CHESTER, sR

BRAKE SHOE AND LINING ASSEMBLY Filed Oct. 3, 1952 R I ma mm y c W d w w Y um B ATTORNEYS Patented July 20, 1954 UNITED STATES FTENT OFFICE 2 Claims.

This invention relates to vehicular brake construction, and more particularly, has reference to an improved brake shoe and brake lining assembly, adapted to be operatively associated with other, conventionally formed parts or" a 'brake mounted upon a vehicle wheel.

Heretofore, a brake lining has been attached to its associated brake shoe by either of two methods of assembly, namely, a riveted connection extending between the lining and sho-e, or a cemented connection whereby the lining is adhesively secured to the shoe.

It is well appreciated that thearrangement wherein the lining is cemented to its associated brake shoe has cer-tain advantages over the riveted arrangement, since it does not result in scoring of 'the brake drum when the lining wears.

However, both of the conventional practices referred to above have a common deciency, arising from the diiiiculty of removing the lining from the shoe when the shoe is to be relined. When a riveted lconnection is employed, for example, it is necessary that the rivets be punched out, and when a cemented connection is employed, it is necessary that the old lining be chiseled and/or ground off.'

These are time consuming operations, as will be appreciated, and normally, keep a car out of service for an undesirably long period of time when the brakes of the vehicle are to be relined.

Additionally, the conventional methods now followed also increase, to an undesirable extent, the labor costs required when new linings are being mounted upon the shoes, since new rivets must be assembled and clinched with the lining and shoe. Alternatively, if a cemented `connection is to be used, the cement must be applied to the lining and shoe, after which the assembled lining and shoe are squeezed in a press until the cement sets.

It is further a characteristic of conventional brake shoe construction that the brake shoe is generally a casting, as a result of which the formation of a brake shoe, during ythe initial manufacture thereof, involves a substantial numvthe manufacture o1 the shoe itself is concerned,

will permit the shoe to be Gonstructed in the form of complementary sections readily shaped by a suitable press from sheet metal material, and capable of being rigidly joined -to provide the completed shoe, in a minimum of time.

Still another object is to provide a brake shoe and lining assembly wherein the shoe and lining are so formed as -to permit the lining to be attached to or removed from its associated shoe merely by movement of the lining longitudinally of the shoe, the construction being such as to eliminate the use of rivets, or of cement.

Still another object is to provide a brake shoe and lining assembly wherein means will be incorporated, that will prevent movement of the lining relative to its associated shoe, in the assembled positions of the lining and shoe, said means being readily removable when the lining is to be replaced by a new lining.

Other objects will appear from the following description, the claims appended thereto and from the annexed drawing, in which like reference characters designate like parts throughout the several views, and wherein:

Figure 1 is a side elevational view of an assembled brake shoe and lining formed in accordance with the present invention;

Figure 2 is a side elevational view of the lining per se;

Figure 3 is a top plan of the assembled lining and shoe, partly in section;

Figure 4 is a developed view, in plan, of the brake lining per se;

Figure 5 is an end elevational view of the assembled shoe and lining, as they appear when viewed from the line 5-5 of Figure 1; and

Figure 6 is an enlarged transverse sectional View through the assembled lining and shoe, taken on line S-B of Figure 1.

Referring to the drawing in detail, the reference numeral l0 has been applied generally to designate the improved brake shoe constituting a component part of the present invention. The reference numeral l2 has similarly been applied generally, to designate the improved brake lining adapted to be removably associated with said shoe.

Considering rst the construction of the shoe lil, said. shoe is formed of a pair of identical, though opposite, brake shoe sections. Each of said sections will be described in turn.

One of the brake shoe sections includes a rib member Hl extending from end to end thereof, said rib member being curved in the direction oi' its length, as shown in Figure 1, and being integral, along its upper longitudinal edge, with a laterally projecting web member I6. The web member l also extends through the full length of the brake shoe, and is curved longitudinally thereof, correspondingly to the rib member Ill.

Thus, it is seen that the brake shoe section de scribed above is, when considered from the standpoint of its cross sectional configuration, shaped right-angularly (see Figure 6).

Integrally ,formed upon theiouter longitudinal edge of the web member I6 is a 'flange I8, said ange being coextensive in length with the web member and including an inner flange portion extending upwardly from the Web member in a plane parallel to the plane of the :rib Vmember '|74. The upper edge of the inner ange portion I8..is integral with one longitudinal edge of an outer flange portion 2U.

The outer nange portion 2E! has been so termed because it constitutes the outer edge portion of the flange formed upon'the web member i5, and as will be noted-'fromFigured Athe outerlange portion is curved lin'thadirection 'of Yits length, along a lineparallel to Lthelongitudinally curved web member I5, -andspaced'closely above said Webmernber.

-'fIn the rib member tlllth'ere. isformed,.at locations spaced longitudinally f fthe 'rib member, openings 322 1 said :openings `being conventionally arrangedzandsized to 'tperrnit "mounting of the brake shoe as acomponent .partof afwheel brake assembly of 'an automobile .for A:other vehicle.

The other brakefshoesection, as "hereinbe'fore noted, is formedidentically butoppositely to the rbrake` shoe section .described immediately above. 'fAccordinglyg the last-named brake fshoe section .includes na rib `meniber 2li :integral along one 'longitudinal e'd'ge with fa v'laterally:projected web member 26, the web gmemberziand rib member .rbeing curvediinr the-:direction of their'lengths. .0n` theiouter longitudinal yedge of the Webmemvloer f2.5 is provided a'fiange havingandnner flange portion 28 extending in :La .plane parallel'to the plane of the rib memberrZllfsaidportion .28 being integralvvith :aniinner` fiange 1-3 0; parallel tothe web member 26.

As Will be noted, the Web :members I5, 2S cooperate to .define 'a `Web fportion v-on #the brake shoe, the rib members I4, 24 cooperating to de- ;flnera mounting: rib-.on-thezbrake shoe. As will be noted, the brake shoe is.thus.:giventhe cross sec- ,V

.tional configuration-.of :a FI'., thisfbeing the-conventional cross sectional conguration of a brake fshoeformed as a solid casting.

However, .thevbrake shoe-.used in the invention is to `be distinguished ifrom fthe A.conventionally 'formed, cast-shoes in that the brake shoe sections can each be pressedout offrsheetmetai man terial, by simple operationsfwith therib members .of Ksaid sections thenibeing disposed in .contact .throughout their -lengths .The contacting rib members are spot-.welded vat selected locations, .thus to rigidly join the`brake shoe sections in :formingthesame into the .brake shoe.

When'the rib members V4, 2li are fixedly coninected, the .openings 2`2 of the member I4 will register with openings'3`2 Yformed inthe mem.- .ber .24.

Considering the `construction of the brake flining, it willbe understood that so'far/as the basic material of which sai'dlining'is formed is concerned, the lining 'canbemanufactured from the same material'asithat'used'in making 4con- .ventional linings. .'Hovvever,the lining utilized inthe invention diifersromconventional linings, in t'hat' form longitudinal grooves 3'4in the opposite longitudinal edge surfaces'ofthe lining.

The lining is shown, in this regard, in Figure 4, the lining being molded in the same manner, and from the same materials, as conventional linings, with the exception that the grooves 34 are formed therein during the molding process.

The grooves 35 are formed in the opposite longitudinal edge surfaces of the lining at locations intermediate the top and bottom faces of the lining, thisconstructionbeing .best shown in Figure .6. `Thereafter,'vhen thelining'is to be assembled with the brake shoe, it is merely necessary that one end of the lining be inserted in one end of the brake shoe, with the lining then 'being-'shifted'longitudinally of the shoe until the ends-of the lining are disposed adjacent the re spective ends of the shoe, in the position shown 1t is important to note, in Ithis regard, that the respective 'grooves 3d are tapered in the direction of their lengths (see Figure 4), the ange portions :29,138 :beingcorrespondingly tapered. The flange .portions di? Lareoppositely tapered, as arethe-grcoves yand thus said flange portions cooperatf-r to .'denera Wedge extending the length of the mbraise `shoe, andy followingthe longitudinal curvature of saidshoe.

.Byreason of this arrangement, When'the lining has been shifted longitudinally `of theshoeto Ya position in which thelining.issubstantially coterminous ivithzthe shoe, the Vlining will be .eiectively wedged in pla-ce, so as tobe heid to the-shoe securely.

itis desirable, hoivevenfthat a positive means be employedfor holding the assembledl shoe and lining Vagainst relative :longitudinal movement. .To thisend, yI vprovide 'an abutment which abutment can be formed from a smallpiece of sheet metalmaterial readilyfpressed toadesired shape. The abutment 35 is inclined as shown in-Figurel, said abutment havingA an upper'edge extended rearwardlytolorm a lip 33. .'ihe'lower :edge of the abutment rSS-is integral with a-base dii, said baseibeing .apertured and the Aadjacent lend oi the'braleshoe beingcorrespondingly aper- ,L tuned, for extension :of fastening elements .d2

36 iszsecured in'place through the medium of lthe fastening 1 elements 42.

At such time as the lining is to be replaced.

.itis merely necessarythat the fastening elementsdl be'removed, thereby permitting the lin- 'ing to rbe shifted out of engagement with the A`ilanges-of the brake shoe, v'for replacement ofa v'nevv' lining, tov-be used in substitution for'the worn lining removed'fromthe shoe.

The advantages inherent in a construction such as illustrated and described are believed many, and are-considered to 'be fairly obvious. t is "thought suicient to note, in this connection'that one important advantage of theconstruction resides inthe capability of thebrake shoe for manuiaoture from sheet 'metal material, thus to rer ducefconsiderably the Ycost of `manufacture of the shoe. Further, :an important advantage resides ALJ in the fact that the lining and shoe can be readily assembled with or disassembled from one another, in a minimum time.

It is believed apparent that the invention is not necessarily confined to the specic use or uses thereof described above, since it may be utilized for any purpose to which it may be suited. Nor is the invention to be necessaril57 limited to the specic construction illustrated and described, since such construction is only intended to be illustrative of the principles of operation and the means presently devised to carry out said principles, it being considered that the invention comprehends any minor change in construction that may be permitted within the scope of the appended claims.

What is claimed is:

1. A brake shoe and lining assembly comprising a pair of brake shoe sections, one of said sections having a web member curved in the direction of its length and a rib member extendingT perpendicularly along one of the longitudinal edges of said web member and the other of said sections having a web member similarly curved in the direction of its length but with a rib member extending perpendicularly along the other of the longitudinal edges of the web member. the rib members oi said sections being rigidly joined in back to back abutting relation with the web members facing away and in alignment with each other, a ange formed on the other longitudinal edge of the web'member of said one shoe section and on the one longitudinal edge of the web member of said other shoe section, each ilange having a portion extending transversely of its associated web member with a free edge portion extending toward and in parallel spaced relation with respect to its associated web member, said free edge portions of the anges being tapered oppositely to define a Wedge, and a brake lining substantially coextensive in length and width with and rearwardly supported upon the web members of said brake shoe sections, said lining having its opposite longitudinal edge surfaces formed with grooves extending from end to end of the lining, said grooves being oppositely tapered in the direction of their lengths to complement and receive the free edge portions of the flanges of said shoe sections.

2. A brake shoe and lining assembly comprising' a pair of brake shoe sections, one of said sections having a web member curved in the direction of its length and a ribmember extending perpendicularly along one of the longitudinel edges oi said web member and the other of said sections having a web member similarly curved in the direction of its length but with a rib member extending perpendicularly along the other of the longitudinal edges of the web member, the rib members of said sections being rigidly joined in back to back abutting relation with the web members facing away and in alignment with each other, a ilange formed on the other longitudinal edge of the web member of said one shoe section and on the one longitudinal edge of the Web member of said other shoe section, each iiange having a portion extending transversely of its associated web member with a free edge portion extending toward and in parallel spaced relation with respect to its associated web member, said i'ree edge portions of the flanges being tapered oppositely to define a wedge, a brake lining substantially coextensive in length and width with and rearwardly supported upon the web members of said brake shoe sections, said lining having its opposite longitudinal edge surfaces formed with grooves extending from end to end of the lining, said grooves being oppositely tapered in the direction of their lengths to complement and receive the free edge portions of the iianges of said shoe sections, and an abutment extending transversely of the web members of said shoe sections adjacent one end thereof and bearing against the adjacent end of said lining to hold said lining in position upon said web members.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 1,169,181 Nichols Jan. 25, 1916 1,246,386 Bly Nov. 13, 1917 1,671,759 Bendix May 29, 1928 1,856,812 Jirka ,May 3, 1932 1,896,013 Reasoner Jan. 31, 1933 FOREIGN PATENTS Number Country Date 3,990 Great Britain Aug. 17, 1883 

